Stop-motion.



W. O. TAYLOR.

STGP MOTION.

nPPucfitoa FILED MY 1. 1916.

Patented Jan. 22, 1918.

UNITED STATES PATENT OFFICE.

WILLIAM O. TAYLOR, 0F LIMERICK, PENNSYLVANIA, ASSIGNOR TO WILDMAN MFG. 00., OF NORRISTOWN, PENNSYLVANIA, A CORPORATION OF ZPENNSYLVANIA.

STOP-MOTION.

Specification of Letters Patent.

Patented Jzu1.22, 1918.

Application filed May 1, 1816. Serial No. 94,705.

To all whom it may (OYU'RTILJ Be it known that l, lViLLiAM O. TAYLOR, a citizen of the United States. residing at Limerick, Pennsylvania, have invented certain new and useful linprovenieuts in Stop Motions. of which the following is a spccifi cation.

The iiiyeiliiun consist in the features and roiubiuutiou und urrzuigement of parts hereinafter describml and particularly pointed out in [he claims.

In, the accompanying drawings:

Figure 1 is a side view of the upper portion of a knitting head with my improvement in place.

Fig. 2 is a detail plain view of parts shown in Fig. 1.

I have shown the invention as applied to a machine of the rib type 1 being the dial post. of such a machine. though I have not thought it necessary to show the needle dial, nor the needle cylinder. It will be understood however that I do not restrict myself in the use of the invention to this type of machine, but it is merely illustrated and referred to :is one instance of the use of the invention. A rotary bobbin stand is shown at 2 und a revolving yurn carrier at 3, these ports moving within a stationary frame ring 4. On a ring 5 revolving with the bobbin stand are pivololly mounted members 6, these being adapted to swing outwardly when free to do so about their pivots 7 supported in brackets 8 carried by the revolving ring member The members 6 which are subjected to the notion of centrifugal fUI'QQ may be of various forms and may be arranged in a variety of ways but in the perticuler construction shown they are pivoted to swing radially of the machine and each of these members in the instance shown. comprises an upwardly extending portion, an outwardly extending head 6' and a foot portion 6". When the yarn fails and allows the member 6 to swing outwardly under centrifugal force as will be presently described, the foot portion 6* will swing down into the path of one of the projections 9 of a ring 10. which is supported on the fixed frame ring and as the member 6 new in revolution about: the axis of the knitting head, the contact of its feet 6* with one of the studs 9 will impart to the ring 10 a rotary movement with the result that one of the radial studs 11 will be brought against. the arm 12 and this arm will be moved to operate the let off mechanism.

hen the machine is running with the yarns feeding properly the members 6, will be held in the position shown at the left of Fig. 1 and in Fig. 2 by the draft ol the yarn over a feeler finger or lever, which connected with and holds the member 6 against outward n'iovcment until such time that the yarn fails. This lever is shown at 13 and in the particular form shown which is an example of my invention this lei-er pivotally mounted at it upon feeler 6. it being in the form of a wire arm, the intermediate portion of which is coiled or turned about the pin at 14 to act as a pivot, the other arm 13 of the lever finding a fulcrum bearing against the side of a post or rod 15 extending up from one of the bearings or brackets 8. The yarn indicated at X comes down from the overhead sweep or other guide passing through :1 guide eye at 16. and thence to the arm 13 of the lever over which it is bent on its way to the yarn guide eye The draft of the yarn is substantially at right angles to the arm 13 of the lever and the point at which this draft is applied to the lever is near the outer end thereof and preferably at the greatest distance possible from the fulcrum 15, it being observed in this connection that the centrifugal memher 6 connects with the feeler lever close to the fulcrum 15 thereof so that compare tively slight draft of the yarn on the feeler finger or lever will maintain this in the normal position shown in Fig. 2 and against the tendency of the member 6 to fly out.- wordly under centrifugal force. In other words a slight draft, or the draft of tender yarn, will be suflicient to hold the centrifugal member (3 against action owing to the relation of the fulcrum 15 to the point of connection with the member 6 and the length of the arm 13 to the point where the draft of the yarn is applied to feeler lever. Now as soon as the yarn breaks or drops off and the feeler lover or finger 13. 13 is relieved from restraint of the draft of the yarn the member 6 will immediately fly out radially under the action of centrifugal force and will cause its i'oot portion (3" to contact with a stud t and rotate the ring it) and through one ot the projections 11 ot' the ring the arm 1:! will he operated to stop the machine.

I prefer to form the arm or l eeler linger 1!. 123 with a fork or loop to emhrace the fulcrum 1.7. so that in resetting the ceutrit'te gal memher t' the l'eeler finger will he automatically reset or converselt h v exerting pressure of the linger or hand upon the portion 'l-l ot' the i eeler linger to reset it. the same act will reset the pivoted member (3. I also prefer to form the 't'eeler linger l3. together with its extension 113' of wire, this heing inexpensive and etl'ective. I provide the 'leeler finger with a hooked end 13* to retain the yarn in engagement therewith. I have shown the member U as movable in a vertical radial plane, and the feeler finger movahle in suhstantiallv horizontal plane hut other dispositions of the e parts may he used to accomplish the results desired within the purview ot my invention.

it will he ohserved that when the arm (3 is in normal position. as shown on the left of Fig. l. the preptntderance or sultstantiall all of its weight is exerted to hold or tend to hold the tnemher in the position shown and this. together with the dratt of the yarn on the teeler linger and the le erage action of said t'eeler iinger will serve to retain the weight memher tt in said normal position until upon the failure. ot' the yarn the restraint exerted h the teelcr linger lever will he removed and centrifugal force will then overcome gravitation and the memher ti will ll) out and operate the let-ofi" connections.

.\n :nliustahle weight may he en'tployed as at 17 mounted to he raised or lowered and this renders the memher (3 more or less sensitive to the action of centrifugal force hut the adjustment ot the weight does not alter the force 01 gra vit v acting on the tnovahle memher. said weight heing adjustable vertically. \n v suitahle stop may he employed to limit the inward i'novement of the weighted nlenr her 6.

The stop motion is adapted for use with any desired numher of feeds. I prefer to have all of the meinhers tt act through the element it) common to them all in actuating the lcl-olt connections. The stop motion devices de crihed may he associated with any desired form of overhead sweep. and with knot catcher devices so that should the yarn he caught at the hobhin and fail to feed or should a knot tangle. or hunch occur the letotf will he operated.

The apparatus is self compensating in that when the speed changes the centrifugal force changes and also the draft of the varn changes. so that a. compensating efl'ect is secured.

It will be observed that as the weighted arm swings outwardly under centrifugal force the leverage exerted by the fecler iinger is decreased. hecau as the t'eeler lever turns the yarn approaches and slides closer to the fulcrum point. lttn'thermore, when the weighted arms more outwardly the attraction ot gravity becomes less effective. be cause of the arm moving over its center and then there will he less resistance to the centrifugal force and as a result of the reduced leverage and reduced gravitation it will be clear that when the pivoted arm 6 is once started. its action is quick or is accelerated h v reducing or removing the opposing tactors or forces.

The relation oi the varn guide openings to the lever is such that when the parts are in normal posit ion. as shown in Fig. 2. the yarn will extend at nacticallv a right angle to the lever or arm.

This stop motion will operate as well when the yarn hrcalv's at the ne dles 1'. c. hetweeu the stop motion device and the tahric, as when it hteaks ahove the stop motion device hccause the operation depends upon the ecs sation ot the d aft of the ":t1'll on the varu lever.

The invention may he used in connection with a sin le teed machine having two threads. which would he laid over the same teeler lever. so that the aggregate drag of these two yarns would he suilicient to hold the feeler lever in normal position. Each yarn would have its own sweep or cast oti' hook and it either one failed the reduction in or removal of its d rag would he such that the centrifugal t'orce would then he suilicicnt to operate the weighted arm or lever.

()ther forms of weighted menthers may he used in place of the levers.

The ring 4' is held against rotative move ment hv au v -uitahle part extending up trom the tixeti main frame.

in order to meet varying conditions at" Feeling control of the centrifugal memher ol the stop motion. such as increased r di minished varn dratt due to running a lighter or heavier gage or to the material or nature of the yarn. and also the variations in speed atl'eeting the amount ot centrifugal force to he controlled. l make the plate lti or ltflllhin stand 1': rr ving the guide e v s ltt adiustahle ahout its xis so that su h adjustm nt. lrv changing the angle at which the yarn l nds over the i eeler lingers lit will cause the length of lever on which the varn acts to he hanged and restrain movement of the entrifugal inetnher to a greater or lesser degree as mav he required.

l prefer to accomplish the result aimed at in this way rather than hv an adjust ment that would att'ect the relative posi tions oi pivot it and Ful rum 13. on account ot the greater ease with which sit-ant taneous adjustment on all or a nmnhcr of ltti lilo

lit

lillt the stop motion units can be accomplished, though the change of leverage desired could be secured in either of the two ways.

In I III show at lo a form of adjustment which is representative of any that may be employed for the purpose, this consisting of; screws (only one being shown) passing tl'irough a slot lfiin the plate and into the stand 2.. V 1. V

Fig. 2 indicates at T6" in 'dottedlines the position to whiehthe guide eye 1 6 may be adjusted by turningthe plate 16?, r V r here it is desired to do plating a pair of the stop motion may beemployed and these ejrset adjacent each other but in row 1 (1 position.

Fig. 2 indicates at l3the feeler lever of the adjacent unit which cooperates with the feeler lever 13 fonguiding the yarn which, together with the yarn guided by the finger 13. is to do plating. In such case the guide eyes for the respectire feelers or units would be adjusted in opjlosite direclions because of the reversed positionof the fcclcr levers. n V V 'hat I claim is: j :5 r

1. In a stop motion for knitting machines the combination of a member movable under the influence of centrifugal force in revolving with the rotar parts of the machine. let-oil connections operated thereby, and a feoler linger engaging and held by the yarn Z and therebyo 'iposing the movement of said member under said force, the failure of the yarn removing said member from the holding influenced said feelcr fingen substan tially as described.

In combination in a stop motion for knitting machines. a member revolving with the rotating parts of themachine and movable under the influence of centrifugal force,

let-off connections operated thereby and'a' fceler finger in the form of a lever, to whieh 7 force is applied by the draft of the yarn in engagement therewith to hole l the said member against said centrifugal force so long as the normal draft of the yarn is maintained. V r, r

3. 'In combination in a stop motion for knitting machines. a member revolving with the m achinc and movable under the influence of centrifugal force; let-off connections oper- Hl'Ptl therebyrand a feeler finger in the form of a lererto the longer arm of which force is applied by the draft of the yarn and the short arm ofwhich reslrains the said member against movement, so long. as the normal draft of the yarn on the lever is maintained. substantially :as described.

4-. In combination in a stoprmotion for knitting machines a member residing with the machine and movable unrler the influence of centrifugal force let-oil conneetions operated thereby and a feeler finger in V the form of a lever of the second order;

wrum than the point where the draft of the yarn is applied to said level. to hold the im-inher against movement so long the proper yarn feed is maintained.

In combination in a stop motion for knitting machines, a pivotal member revolv ing with the machine and adapted to mo e radially outward under centrifugal force, and a feeler finger engaging said pivotal member, said feeler finger being held in position by the draft of the yarn to retain the said pivoted member against action unlil the yarn fails, substantially as described.

0. In combination in a stop motion for knitting machines, a pivoted member rcrolv ing with the machine and adapted to more outwardly under centrifugal force. and a ifecler finger in the form of a lever fulcrumed on the machine and engaging said pivotally mounted member, said fceler linger being held in position by the draft of the ern to retain the said pivoted member against action until the yarn fails, substantialhf as described. 7

T. In combination in a stop motion for knitting machines. a pivoted member re \olving with the machine and adapted to more outwardly under centrifugal force. and a feeler linger in the form of a lever fulcrum-ed on the machine and pivotally conneried with said member nearer the levers fulcrum than the point where the draft of the yarn is applied to said lever to hold it and retain said member against centrifugal force. substantially as described.

8. In a stop motion for knitting machines and in combination a member revolving with the rotsrgg parts of the machine and pivotally mounted to swing in a substantially vertical and radial plane under centrifugal force and a feeler finger in the form of a lever pivoted to the upper part of said memher and a fulcrum for said lever, said feeler finger restraining said member under the draft of the yarn and until the yarn fails,

substantially as described.

9. Incombination'in a stop motion for knitting machines, a member pivotally mounted to swing in a vertical plane the preponderance of Weight of said member when in normal position being toward the inside of the pivot thereof and nearest to the axis of the machine and a feeler finger to engage the thread pivotally mounted on said member and a fulcrum for the feeler finger, substantially as described.

10. In combination in a stop motion for a knitting'machine a member pivotally mount ed and normally held toward the center of the machine and a feeler finger pivotally connected to said member and having a forked portion and a fulcrum engo glue said forked portion substantially as described.

11. In combination in a stop motion for a knitting machine, a member pivotally mounted, an adjustable weight carried by said member and holding the same normally toi ard the center of the machine, said memher being adapted. to move outwardly from said normal position under the action of centrifugal force and a feeler linger pivotally connected with said lever, substantially as described.

12. In combination in a stop motion for knitting machines. a member revolving with the machine about a vertical axis, said member being mounted on a pivot constantly maintained in a horizontal plane to swing outwardly in a radial plane under centrif ugal force while the machine is in motion. and gravitating toward the center of the machine when at rest, said pivoted member at all of its angular positions about the said vertical axis responding uniformly to either of said forces, said member being additionally restrained against outward movement. by the yarn, aml a let-ofi' connection operated by said member when moved out by centrifugal force.

13. In combination in a stop motion for circular knitting machines, a member rotating with the machine and movable under centrifugal force, a feeler finger connected with said member and subjected to the drag of the yarn to restrain the said member against movement. said feeler finger exerting a lever action upon said member, and means of adjustment to render the drag of the yarn more or less effective in operating said feelcr finger to restrain the movement of the member, substantially as described.

14. In combination in. a stop motion for circular knitting machines. a member rcvol ving with the machine and movable under centrifugal force, a feeler finger subjected to the draft of the yarn and exerting a restraining influence on the said member, a yarn guide directing the yarn to the feeler finger, said yarn guide being adjustable to change the point of application of said draft on the feeler finger to vary the restraining effect of the feeler finger on said member, and let off connections controlled. by the said member, substantially as described.

15. In combination in a stop motion for circular knitting machines. a plurality of members revolving with the machine and movable under centrifugal force, a feeler finger connected with each member and sub jectcd to the draft of the yarn individual thereto. said feeler fingers exerting a restraint on the members against movement and a plurality of yarn guides adjustable simultaneously to vary the points of contact of the yarns with the feeler fingers to vary their restraining power on the members and let off connections controlled by the said members, substantially as described.

16. In combination in a stop motion for circular knitting machines, a plurality of members revolving with the machine and movable under centrifugal force, a feeler linger connected with each member and subjected to the draft of the yarn individual thereto, said feeler fingers exerting a restraint on the members against movement and a plurality of yarn guides mounted upon an adjustable plate and thereby adjustable simultaneously to vary the points of Contact of the yarns with the feeler fingers to vary their restraining power on the members and let otf connections controlled by the said members, substantially described.

17. In combination in a stop motion for circular knitting machines, a pair of members revolving with the machine and movable under centrifugal force, a feeler finger connected with each member and subjected to the draft of the yarn individual thereto. said feeler fingers exerting a restraint on the members against movement, and extending in opposite directions with their yarn receiving ends adjacent for plating, substantially as described.

18. In combination in a stop motion for knitting machines, a let off connection. a member pivotally mounted to swing in a vertical plane and movable under stress to throw the same into engagement with said let off connection to render the same effective in stopping the machine. and a feeler finger subjected to the draft of the yarn and resisting the movement of the said member under said stress as long as the draft of the yarn is maintained, said feeler finger being in the form of a lever pivoted to said pivotally mounted member and turning about a fixed fulcrum. substantially as described.

19. In combination in a stop motion for knitting machines, a let off connection, a member pivotally mounted to swing in a vertical plane and movable under stress to throw the same into engagement With said let off connection to render the same efiective in stopping the machine. and a feeler finger subjected to the draft of the yarn and resisting the movement of the said member under said stress as long as the draft of the yarn is maintained, said feeler finger being in the form of a lever pivoted to said pivotally mounted member and turning about a fixed fulcrum, the longer arm of said lev* being engaged by the yarn, substantially as described.

20. In combination in a stop motion for knitting machines. a let off connection. a member movable under stress to throw the same into engagement with said let off connection to render the same effective in stopping the machine. and a feeler finger subjected to the draft of the yarn and resisting the movement of the said member under said stress as long as the draft of the yarn is maintained, said member being pivotally mounted to swing under said stress and the feeler finger being pivoted thereto and turning about a fixed fulcrum, substantially as described.

21. In combination in a stop motion for knitting machines, a member pivot-ally mounted and being under stress to swing it in a. vertical plane and a yarn controlled fccler finger in the form of a lever pirotally mounted at the upper part of said member and turning about a fixed fulcrum, and a let off connection controlled by the pivotally mounted member, substantially as described.

In combination in a stop motion for knitting machines, a member pivotally mounted and being under stress to swing it in a vertical plane and a yarn controlled feeler finger in the form of a lever pivotally mounted at the upper part of said member and turning about a fixed fulcrum, and a let off connection controlled by the pivotally mounted member, said feeler finger turning in a substantially horizontal plane, substantially as described.

23. In combination in a stop motion for knitting machines, a. member pivotally mounted and being under stress to swing it in a vertical plane and a yarn controlled feeler finger in the form of a lever pivotally mounted at the upper part of said member and turning about a fixed fulcrum, and a. let off connection controlled by the pivotnlly mounted nieniljicr, said lever hering a slot to receive said fulcrum allowing the lever to turn and slide on the fulcrum, substantially as described.

2%. In combination in a stop motion for knitting machines, a member pirotally mounted to swing in u vertical plane, a fecler finger subjected to the draft of the yarn and pivoted intermediate of its length to the top of the said vertically disposed member, a fixed fulcrum for the said linger located adjacent the vertically disposed member, the yarn engaging arm 01' said feeler being longer than and on the opposite side of the pivot from that portion which engages the fulcrum.

In testimony whereof, I aliix my signature.

W'ILLIAM O. TAYLOR.

Copies of this patent may be obtained for five cents eaeh, by addressing the "Commissioner of Patents,

Washington, D. (3. 

